Malicious PDF — malware analysis report

Static analysis result for SHA-256 45baf4ac46fa7502…

MALICIOUS

PDF

81.5 KB Created: 2009-08-22 11:11:20 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: ee3bc6ce4af34ea523824607ca17cba7 SHA-1: fc2ed41d7512a73c8b6d59a3c80e186e5a08f3eb SHA-256: 45baf4ac46fa750235ab7595a76a16b71331a82a48e6f4c1de156db244f91a36
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent-7256244-0 and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the presence of JavaScript, including an eval() call, suggesting obfuscated code execution. This code is likely responsible for downloading and executing a second-stage payload, a common dropper behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7256244-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7256244-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0040_000.js
f6480ad5ff20b1ca4e496edef5be9ec823a03d6c3e7514c36171ba6c88a4cb13		 pdf-javascript-stream PDF /JS object 40 at offset 0x114F6 96 bytes
javascript_obj0041_001.js
ce774c94e6e8d94c5efa4f859c1c61c5a3d4776eb92a1fa89ecb1bcf91a263fc		 pdf-javascript-stream PDF /JS object 41 at offset 0x1158C 22720 bytes
javascript_obj0042_002.js
4cc23ed1c07b39412ebfa2e4d284e99a923466c86a686bf6229e58c5a43f059c		 pdf-javascript-stream PDF /JS object 42 at offset 0x13F63 274 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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